Ls/vtec And Gas Question

hi,
i was wondering if pump super at 91 would work for a ls/vtec with a comptession of 12.4 to 1?
are there any recommendations on what compression uses 91? what do the different compressions need?
i wanna run pump gas and am current debating on getting ctr over bore pistons or just itr over bore pistons.
any help would be great
Ac